Benzoxazole stabilizer compounds and polymeric materials stabilized therewith

Abstract

Disclosed are compounds having the formula ##STR1## wherein X is the residue of a benzoxazole radical; Y is carboxyl, alkoxycarbonyl, alkanoyl, cyano, carbamoyl, N-alkylcarbamoyl or N,N-dialkylcarbamoyl; and A is phenyl, naphthyl or phenyl or napthyl substituted with one or more substituents selected from hydroxy, halogen, alkyl, alkoxy, cycloalkyl, aryl, aryloxy or Y. Also disclosed are polymeric materials stabilized against degradation by ultraviolet light by the incorporation therein of one or more of the above-defined compounds.

We claim: 
     
       1. A compound having the formula ##STR9## wherein R 1  is hydrogen, alkyl, alkoxy or halogen; R 2  is an R 1  substituent, carboxyl or alkoxycarbonyl;   Y is carboxyl, alkoxycarbonyl, alkanoyl, cyano, carbamoyl, N-alkylcarbamoyl or N,N-dialkylcarbamoyl; and   A is phenyl or phenyl substituted with one or more substituents selected from hydroxy, halogen, alkyl, alkoxy, cycloalkyl, aryl, aryloxy or Y.   
     
     
       2. A compound having the formula ##STR10## wherein R 1  is hydrogen, alkyl, alkoxy or halogen; R 2  is an R 1  substituent, carboxyl or alkoxycarbonyl; and   R 3  and R 4  are independently selected from hydrogen, alkyl, alkoxy, hydroxy, halogen, cycloalkyl, aryl or aryloxy.   
     
     
       3. A compound having the formula ##STR11## wherein R 2  is hydrogen, alkyl, alkoxy, chlorine, carboxyl or alkoxycarbonyl; Y is alkoxycarbonyl or cyano; and   R 3  is ortho or para hydroxy or alkoxy.   
     
     
       4. A compound having the formula ##STR12## 
     
     
       5. A compound having the formula ##STR13## 
     
     
       6. A compound having the formula ##STR14## 
     
     
       7. A compound having the formula ##STR15## 
     
     
       8. A stabilized composition comprising an organic material normally degraded by exposure to ultraviolet light containing a stabilizing amount of a compound having the formula ##STR16## wherein R 1  is hydrogen, alkyl, alkoxy or halogen; R 2  is an R 1  substituent, carboxyl or alkoxycarbonyl;   Y is carboxyl, alkoxycarbonyl, alkanoyl, cyano, carbamoyl, N-alkylcarbamoyl or N,N-dialkylcarbamoyl; and   A is phenyl or phenyl substituted with one or more substituents selected from hydroxy, halogen, alkyl, alkoxy, cycloalkyl, aryl, aryloxy or Y.   
     
     
       9. A stabilized composition according to claim 8 wherein the organic material comprises a polymer containing ester groups. 
     
     
       10. A stabilized polymeric composition comprising a polyester containing recurring phthalate moieties and a stabilizing amount of a compound having the formula ##STR17## wherein R 2  is hydrogen, alkyl, alkoxy, chlorine, carboxyl or alkoxycarbonyl; Y is alkoxycarbonyl or cyano; and   R 3  is ortho or para hydroxy or alkoxy.